Flounder · Platichthys flesus

Flounder in the Holland Brook (Main Reaches)

Largest measured flounder: 28.5 cm

The largest flounder measured in Environment Agency surveys of the Holland Brook (Main Reaches) was 28.5 cm, recorded at Sladburys on 25 November 1999.

Across 21 measured flounder, the median measured length was 18.3 cm.

Surveyors recorded weights for 3 flounder. The median was 5.5 oz (0.155 kg) and the largest recorded weight was 6.5 oz (0.183 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Holland Brook (Main Reaches).

See flounder records across England →

Most recent observation4 November 2014Holland Bridge · 4 fish

Largest measured flounder: 28.5 cm
Median length: 18.3 cm
Fish measured: 21
Survey locations: 5

Individual EA measurements

Largest measured flounder

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

Length	Survey date	Survey location	Survey ID
28.5 cm	25 Nov 1999	Sladburys	14645
26.7 cm	22 Oct 2014	Fan Bridge	143691
25.3 cm	2 Nov 1990	Clacton STW	14616
23 cm	30 Nov 1987	Thorpe STW	14612
22.2 cm	22 Oct 2014	Fan Bridge	143691
21.9 cm	22 Oct 2014	Fan Bridge	143691
20.1 cm	22 Oct 2014	Fan Bridge	143691
19.9 cm	4 Nov 2014	Holland Bridge	144116
19.7 cm	4 Nov 2014	Holland Bridge	144116
18.3 cm	4 Nov 2014	Holland Bridge	144116

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where flounder were found

Each point marks a survey location with at least one flounder record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyed	First recorded	Last recorded	Visits finding flounder
Holland Bridge	10 Nov 1987	4 Nov 2014	3
Fan Bridge	15 Nov 1984	22 Oct 2014	3
Sladburys	25 Nov 1999	25 Nov 1999	1
Clacton STW	2 Nov 1990	9 Oct 1996	2
Thorpe STW	30 Nov 1987	30 Nov 1987	1

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

1984–2014

Survey records by year

Each bar shows how many survey visits recorded flounder that year.

184

085

086

287

088

089

190

091

092

093

094

095

196

097

098

299

000

001

002

003

004

005

006

107

008

009

010

011

012

013

214

Fish measured by surveyors

Measured length distribution

See how the 21 measured fish were spread across different length ranges.

Smallest: 8.7 cm
Lower quarter: 14.3 cm
Median: 18.3 cm
Upper quarter: 21.9 cm
Largest: 28.5 cm

0–99 mm

100–199 mm

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 3 flounder. This is a subset of the measured fish and may not represent the whole population.

Lightest: 1.3 oz (0.037 kg)
Lower quarter: 3.4 oz (0.096 kg)
Median: 5.5 oz (0.155 kg)
Upper quarter: 6 oz (0.169 kg)
Heaviest: 6.5 oz (0.183 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the Holland Brook (Main Reaches)

Compare other species with enough survey and measurement data for a detailed page.

European eel Roach Perch Rudd Tench Common carp

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →